Working Guide to Unlock PDF Owner Password
Download & Install the software in any Windows Machine
Then Launch it from Start » Programs » PDF1 » PDF1
In the first screen of the software you will see 2 options; Unlock & Lock
Here the requirement is to Unlock PDF so choose "Unlock"
Choose PDF files using any of the buttons:
Add PDF…: To choose files 1 by 1
Add Folder…: To choose the entire folder of PDF files at once
Check Select All option, if you want to unlock all files. If you do not want to unlock all files, then uncheck all files from the list
Click on Browse button to choose a location to save the PDF files after unlocking.
Click on "Unlock PDF" to begin the process
When it done, you get this message